You're going to need QuickTime 6+ for this and probably a broadband or LAN connection. The URLs will not work as links (you have to copy/paste into a new browser window) and they might take a minute or two to load ... but as the Guinness people are forever telling us, it's definitely worth the hassle and the wait!
speaking of which, My Goodness My Guinness http://www.bestadsontv.com/ad_details.php?id=634
Hang the expense - go for a Stella! http://www.bestadsontv.com/ad_details.php?id=151
Singin in the Rain -- with my Volkswagen. http://www.bestadsontv.com/ad_details.php?id=25
so very very sad - a Heineken moment. http://www.bestadsontv.com/ad_details.php?id=32